The cold vacuum of space is only a few degrees above absolute zero.
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Neptune appears blue because of methane in its atmosphere.
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There are rogue planets drifting through space with no star at all.
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Fast radio bursts are powerful millisecond-long radio pulses from distant galaxies.
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There are planets made of diamond.
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The observable universe is about 93 billion light‑years wide.
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The universe is estimated to be about 13.8 billion years old.
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Venus rotates in the opposite direction of most planets in our solar system.
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